Method Begin

extern/imgui/imgui.cpp:2745–2768

}

void ImGuiListClipper::Begin(int items_count, float items_height)
{
    ImGuiContext& g = *GImGui;
    ImGuiWindow* window = g.CurrentWindow;
    IMGUI_DEBUG_LOG_CLIPPER("Clipper: Begin(%d,%.2f) in '%s'\n", items_count, items_height, window->Name);

    if (ImGuiTable* table = g.CurrentTable)
        if (table->IsInsideRow)
            ImGui::TableEndRow(table);

    StartPosY = window->DC.CursorPos.y;
    ItemsHeight = items_height;
    ItemsCount = items_count;
    DisplayStart = -1;
    DisplayEnd = 0;

    // Acquire temporary buffer
    if (++g.ClipperTempDataStacked > g.ClipperTempData.Size)
        g.ClipperTempData.resize(g.ClipperTempDataStacked, ImGuiListClipperData());
    ImGuiListClipperData* data = &g.ClipperTempData[g.ClipperTempDataStacked - 1];
    data->Reset(this);
    data->LossynessOffset = window->DC.CursorStartPosLossyness.y;
    TempData = data;
}

void ImGuiListClipper::End()
{